@article{BasuGumpertLohbreieretal.2024, author = {Basu, Robin and Gumpert, Fabian and Lohbreier, Jan and Morin, Pierre-Olivier and Vohra, Varun and Liu, Yang and Zhou, Yinhua and Brabec, Christoph J. and Egelhaaf, Hans-Joachim and Distler, Andreas}, title = {Large-area organic photovoltaic modules with 14.5\% certified world record efficiency}, series = {Joule}, volume = {8}, journal = {Joule}, number = {4}, publisher = {Elsevier BV}, issn = {2542-4351}, doi = {10.1016/j.joule.2024.02.016}, pages = {970 -- 978}, year = {2024}, abstract = {Organic photovoltaics (OPVs) have experienced a significant increase in power conversion efficiency (PCE) recently, now approaching 20\% on small-cell level. Since the efficiencies on the module level are still substantially lower, focused upscaling research is necessary to reduce the gap between cells and modules. In this work, we present the upscaling of PM6:Y6-C12:PC 61 BM-based devices, processed in ambient air from non-halogenated solvents, from small-area cells to large-area modules with barely any performance loss. Supported by computational fluid dynamics simulations, an acceler- ated blade coating process that enables homogeneous coatings with <5\% thickness deviation over 200 cm 2 is developed. Additional finite element method simulations are used to optimize the module layout and minimize the inevitable losses caused by electrode resistances and inactive interconnect areas to 1.9\% and 3.5\%, respectively. Finally, a 204-cm 2 OPV module with a certified PCE of 14.5\% (15.0\% on active area) is fabricated, which constitutes the new world record.}, language = {en} } @article{GumpertJanssenBasuetal.2024, author = {Gumpert, Fabian and Janßen, Annika and Basu, Robin and Brabec, Christoph J. and Egelhaaf, Hans-Joachim and Lohbreier, Jan and Distler, Andreas}, title = {On the theoretical framework for meniscus-guided manufacturing of large-area OPV modules}, series = {Progress in Organic Coatings}, volume = {192}, journal = {Progress in Organic Coatings}, publisher = {Elsevier BV}, issn = {0300-9440}, doi = {10.1016/j.porgcoat.2024.108505}, pages = {10}, year = {2024}, abstract = {Although the formation of plasma electrolytic oxidation (PEO) coatings on aluminum alloys can significantly enhance their service life, they may still suffer from corrosion damage when exposed to harsh environments with strong corrosivity for a long time. In this work, chitosan (CS) was dissolved in four acids, i.e. hydrochloric acid (HCl), citric acid (CA), lactic acid (LA), and acetic acid (HAc), and deposited onto the PEO-coated 5052 aluminum alloy using dip coating method. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS), atomic force microscope (AFM), contact angle (CA) meter, grazing incidence X-ray diffraction (GIXRD), Fourier transform infrared spectrometer (FTIR), and electrochemical workstation system were used to explore the enhancement of the corrosion resistance of PEO-coated 5052 aluminum alloy by application of CS film prepared in different solvent acids. The results showed that the interactions between chitosan and acid ions affects the uniformity, hydrophobicity, thickness and surface roughness of the CS/PEO coating. The HAc-CS/PEO coating had the lowest surface roughness of 32.4 ± 3.9 nm, the largest contact angle of 85.7 ± 2.0◦, and the thickest CS film of 20 μm, which significantly improved corrosion resistance of PEO-coated aluminum alloy.}, language = {en} }